To Edward Frankland 12 July 1873
Summary
Seeks the assistance of a professional chemist in securing a qualitative analysis of the fluid secreted by the glands of Drosera which have the power of dissolving animal matter out of the bodies of insects. [See 8979.]
| Author: | Charles Robert Darwin |
| Addressee: | Edward Frankland |
| Date: | 12 July 1873 |
| Classmark: | The John Rylands Library, The University of Manchester |
| Letter no: | DCP-LETT-8977A |
To Edward Frankland 21 September [1873]
Summary
Although CD’s experiments with pepsin were unsuccessful, he observed that the glands [of Drosera] as far as acid is concerned act just as the stomach of a mammal. Further experiments detailed. The secretion must contain something analogous to pepsin. [See 9062.]
| Author: | Charles Robert Darwin |
| Addressee: | Edward Frankland |
| Date: | 21 Sept [1873] |
| Classmark: | The John Rylands Library, The University of Manchester |
| Letter no: | DCP-LETT-9061A |
To Edward Frankland 12 April 1874
Summary
Finding that the leaves of Drosera digest all the phosphate of lime out of bones and then remain clasped over the bones for a long time, CD wants to determine whether it is the phosphate of lime or the animal matter in the bones that keeps them clasped. He asks EF to send 2 or 3 grams of pure phosphate of lime for his testing. [See 9411.] Will experiment in the summer using EF’s suggestion that leaves might serve to test weak sewage. Results of Sanderson’s experiments with acids of great use.
| Author: | Charles Robert Darwin |
| Addressee: | Edward Frankland |
| Date: | 12 Apr 1874 |
| Classmark: | The John Rylands Library, The University of Manchester |
| Letter no: | DCP-LETT-9405A |
To Edward Frankland [10 November 1873]
Summary
Requests permission to call upon EF either Friday or Saturday morning [14 or 15 November].
| Author: | Charles Robert Darwin |
| Addressee: | Edward Frankland |
| Date: | [10 Nov 1873] |
| Classmark: | The John Rylands Library, The University of Manchester |
| Letter no: | DCP-LETT-9137A |
To Edward Frankland 27 April [1876]
Summary
Requests permission to call upon EF any morning from Saturday through Tuesday.
| Author: | Charles Robert Darwin |
| Addressee: | Edward Frankland |
| Date: | 27 Apr [1876] |
| Classmark: | The John Rylands Library, The University of Manchester |
| Letter no: | DCP-LETT-10480A |
| letter | (5) |
| Darwin, C. R. | (5) |
| Darwin, C. R. | (5) |
| Frankland, Edward | (5) |
